Hypsometric refers to the measurement of height or elevation above sea level. Synonyms for this term include altimetry, elevation, topography, and height measurement. Altitude measurement is another synonym for hypsometry. Topography refers to the study of surface features, including elevations and depressions, and is often related to hypsometric measurements. Elevation refers to the vertical distance above a point of reference, and is frequently used in conjunction with hypsometry when describing terrain or geographical features. All of these terms share a common theme of describing the height or elevation of a particular location relative to a given point of reference, typically sea level.